Required: (a) Calculate the approximate annual rate of return on investment of the following cash discount terms: (Do not round your intermediate calculations. Round your final answers to 1 decimal place. Omit the "%" sign in your response.) ROI 1/15, net 30 % 2/10, net 60 % 1/10, net 90 % (b) Which of the above terms is not likely to be a significant incentive to the customer to pay promptly